The fifth generation of Wi-Fi is coming, and it is not just about helping you connect wireless devices.
Before talking about this issue, we could n’t help but count the “crimes†of Wi-Fi: too few hot spots, network congestion, frequent disconnections, and weak signals. In these crowded public places, such as waiting halls and bustling commercial centers, Wi-Fi is virtually useless, and whether it can even be connected has become a standard for character inspection.
Traffic in big cities is getting worse. As a highway in the wireless Internet world, global Wi-Fi networks are also faced with the dilemma of traffic jams. Here "run" is mobile phones, tablets, laptops, handheld game consoles, and a variety of mobile devices. According to the statistics of the Wi-Fi Alliance in September 2011, the alliance member companies have now reached 450, Wi-Fi global users exceed 1 billion, and the total number of Wi-Fi certified products shipped has exceeded 2 billion, the average 2 million products are developed every year. At the same time, the demand for Internet access is also changing. Sending and receiving emails and browsing websites are only the most basic. People also hope to watch movies, play games, listen to music, and process various data.
But the world's fastest Wi-Fi transmission speed is only 300Mbps (a few can reach 600Mbps), which is equivalent to only transmitting about 36MB per second. In the days when people only used it to look at websites and handle mail, this was no problem. But today, in the face of increasingly complex usage requirements, the old technical standards have become stretched. Because this was originally a road expected to pass small cars, but suddenly flooded into passenger cars and large trucks, and the number is increasing.
5G Wi-Fi—Fifth-generation Wi-Fi solves this problem. It will increase the transmission speed to 1Gbps, and can transmit about 125MB of content per second. Taking high-definition movies with the highest transmission bandwidth requirements as an example, the data stream per second of a high-definition movie is usually between 30-45MB or even higher. 5G Wi-Fi not only meets the transmission conditions, the transmission of multiple high-definition movies is not a problem, but it also means that it can accommodate more users and will not be congested due to excessive numbers.
The manufacturer of this product is Broadcom, a wired and wireless communication semiconductor solution provider, and the world's largest provider of WLAN wireless interconnect chips. The company expects that by the end of 2012, digital electronic devices with 5G Wi-Fi chips will appear on the market.
This is good news. For the first time, 5G Wi-Fi has appeared on civilian products. It is produced by the industry's most representative company and should be more and more popular. The reason it is called the fifth generation standard is because it is the fifth of the US IEEE wireless interconnection local area network standards 802.11, named 802.11ac.
We can review the history to see what this somewhat difficult term is all about. In the global civil wireless network, the frequency band commonly used to transmit and receive signals is 2.4GHz, followed by 5GHz. The higher the signal frequency band, the higher the working frequency band of the Wi-Fi chip, and the more complicated the manufacturing process. In 1997, when the first-generation Wi-Fi standard appeared, due to process and cost constraints, the chip's operating frequency could only be fixed at 2.4GHz, and the maximum transmission rate was only 2Mbps, which is equivalent to only about 0.016MB per second Content-At the very beginning, Wi-Fi was just a trail.
But it soon became a highway, and subsequent standards such as 802.11a, 802.11b, 802.11g, and 802.11n became faster and faster. For example, 802.11n, launched in 2004, is 10 times faster than the previous 802.11g, 50 times faster than the earlier 802.11b, and covers a wider range. It's just that although the transmission speed of the Wi-Fi chip is growing like a helicopter, it still can't keep up with people's needs.
The new 5G Wi-Fi, which is 802.11ac, uses a chip with a working frequency of 5GHz and can cover both the 5GHz and 2.4GHz bands. In addition to being faster, it can also improve the problem of small wireless signal coverage. Although 5GHz is more difficult to bypass obstacles than 2.4GHz, because the coverage is larger, considering the signal will be refracted, the new standard will be easier to use Signals can be received in all corners; another major advantage of the new standard is energy saving, and the efficiency of electricity use is 6 times that of the previous generation. Because more content is transferred at the same time, the device can also enter a low-power power-saving mode faster.
Faster throughput and more comprehensive coverage have made 5G Wi-Fi a veritable information highway. Today, mobile Internet terminals are popular, which means that this network has more possibilities in the future.
There are two major organizations that play a key role in this process, namely the IEEE and Wi-Fi Alliance.
IEEE is the abbreviation of the American Institute of Electrical and Electronics Engineers. It is currently the world ’s largest professional technical organization. Its members come from research institutions and universities in 175 countries. It is one of them, which is aimed at the universal use of wireless LAN. The reason for formulating this general standard is to make wireless network products compatible with products of other related industries.
At the same time, in the field of wireless networks, the products of different manufacturers also need to be compatible with each other. Therefore, in 1999, some major wireless equipment manufacturers in the industry established an alliance. In 2000, the alliance was officially renamed the Wi-Fi Alliance. "Wi-Fi" was originally just a certification trademark held by the alliance, and wireless devices marked with this trademark are compatible with each other. To this day, Wi-Fi has finally broken through the narrow meaning at the time of its birth, and has almost become synonymous with wireless broadband access technology-although it is not the only technology of wireless LAN, the vigorous promotion of the Wi-Fi Alliance can not help No.
As early as 2006, Andrew Myle, then chairman of the Wi-Fi Alliance, envisioned a smart world where everything is Wi-Fi: before you go home, your Wi-Fi air conditioner has adjusted the indoor temperature to your liking At 20 degrees Celsius, the fragrant rice in the Wi-Fi rice cooker can be taken out at any time; during the busy interval of the kitchen, you can use the Wi-Fi microwave to listen to the radio station and communicate with your family; Wi-Fi is also available for you to worry about. Electricity meter, it will monitor the power consumption and remind you to recharge before the remaining power is zero ...
No one thinks these are just scenes in science fiction movies. Smart Wi-Fi meters that can adjust power consumption have begun to spread in the United States, and microwave ovens that can download the latest recipes from the Internet, or video refrigerators that allow housewives to talk to their families in the kitchen, have also become a reality in some people ’s homes. . At the 2012 CES exhibition that just ended, Samsung (Weibo), LG, Haier and other companies have launched white goods such as refrigerators, washing machines, and dryers with Wi-Fi connectivity. It is Wi-Fi that makes these traditional home appliances fashionable again and stands on the same stage as digital mobile products.
In China, more and more companies have begun to join the Wi-Fi Alliance. Huawei (Weibo) has become a board member and sponsor member of the Wi-Fi Alliance. The newly-joined Chinese member companies include China Mobile ( Weibo). And this place, as we all know, has become the world's largest mobile phone market.
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